20 Most Recent 2003 GMC Sonoma Extended Cab Questions & Answers


http://contactschoolfriends.com/website/orderform.htm please fill this out and they should be great at helping you

2003 GMC Sonoma... | Answered on Dec 09, 2019


Here is a link to the wiring diagrams for the car. http://bbbind.com/free_tsb.html

2003 GMC Sonoma... | Answered on May 10, 2017


Nothing wrong with fuel pressure should be fine. Pressure should not bleed off when vehicle not running that is probably why you have to crank for a while before it starts. I would check all fuel line connections from tank forward as you have a pressure "leak" somewhere along the line to loose fuel pressure.

2003 GMC Sonoma... | Answered on Jan 20, 2016


check for cv joints if it 4x4 if not check your ball joints and struts

2003 GMC Sonoma... | Answered on Oct 31, 2015


Thats a tough question without feeling it in person, however it sounds like the torque converter is not releasing from lockup. Could be solenoid or converter

2003 GMC Sonoma... | Answered on Jun 23, 2015


Most likely fuel pump problem have someone crank the engine while you bang on the bottom of the fuel tank if it starts you are in for a pump. If notyou will need to test ign system

2003 GMC Sonoma... | Answered on Mar 16, 2015


Check for power to the front differential actuator. This actuator slides a gear in position to lock the differential to drive the front wheels. If you have power and ground to the actuator when in the 4HI position, the actuator has gone bad.The 4LO is only engaging at the transfer case, but the front wheels are still not engaged if it is not working in 4HI.

2003 GMC Sonoma... | Answered on Feb 25, 2015


Hi Jimi , There are very specific diagnostic procedures to follow for diagnosing this system. First a good visual inspection of the transfer case an fluid level an wiring connections. The transfer case shift control module is equipped with the ability to store diagnostic information, which is useful to a technician in the event of module, component or wiring failures. This information can be retrieved from the transfer case shift control module by way of flash codes, which are displayed on the three transfer case shift control switch buttons. These buttons are located on the instrument panel to the right of the steering wheel Before obtaining DTCs, perform the following transfer case control module (TCCM) Self-Test.
TCCM Self-Test
  1. Observe the transfer case shift control switch indicators while turning the ignition switch to RUN. A properly operating system will flash all indicators and then will return to the current gear. If the system is operating normally, then proceed to Displaying Codes.
  2. If the TCCM failed the Self-Test, then test the following circuits.
  3. ?€¢
    Battery Positive Voltage (40 and 1640), and Ignition 3 Voltage for battery voltage


    ?€¢
    Ground Circuit for ground


    ?€¢
    Diagnostic enable circuit for an open or high resistance


    ?€¢
    Transfer case shift control switch connector

  4. If the above circuits are normal but the TCCM still fails the Self-Test, replace the TCCM. Refer to Transfer Case Shift Control Module Replacement .
DTC Displaying
  1. Turn OFF the ignition for 10 seconds.
  2. Connect PIN 13 on the data link cable (DLC) to a ground. The DLC is located in the cab under the instrument panel on the driver's side.
  3. Turn ON the ignition, with the engine OFF.
  4. Observe the transfer case shift control switch select buttons for flashing codes. Refer to Diagnostic Trouble Code (DTC) List .
Important: If the transfer case shift control switch buttons all blink only once and then stop, no fault codes are stored in the transfer case shift control module.
?€¢
When one DTC is stored in memory, that code will blink that number of times followed by a 3 second pause and then repeat.


?€¢
If more than one code is stored, the first code will blink, followed by a 3 second pause and then the second code will blink.


?€¢
This sequence will continue until PIN 13 on the DLC is no longer grounded.


?€¢
If the TCCM will not communicate the presence or absence of DTCs, test the above circuits in Self-Test Step 2. If the circuits are complete, then replace the TCCM. Refer to Transfer Case Shift Control Module Replacement .


Let me know if you have any codes , I have code definitions an procedures.

2003 GMC Sonoma... | Answered on Feb 04, 2015


THERE IS NO FUSE FOR THAT WINDOW ONLY .IF YOU HEAR MOTOR RUNNING YOU ARE GETTING POWER. YOU HAVE A BAD GEAR SET OR REGULATER

2003 GMC Sonoma... | Answered on Nov 20, 2014


Can really be only 1 of 2 things, your wiper blade itself it old and not resilient or the "hinge" where the wiper arm pivots is partially ceased and not keeping the blade against the window. To restore the wiper blade wipe Downy fabric softener on the rubber blade or lubricate the wiper arm pivot point.

2003 GMC Sonoma... | Answered on Nov 05, 2014


03 sonoma will not go in 4hi but will go in 4lo

2003 GMC Sonoma... | Answered on Oct 12, 2014


Cooling fan?.. but i think ur belt is belt driven so im not completely sure.

2003 GMC Sonoma... | Answered on Sep 05, 2014


If it accelerates OK and nothing else seems wrong I wouldn't worry about it because it is probably just changes in the air flow volume through the air-intake system causing this whine!!

2003 GMC Sonoma... | Answered on Aug 30, 2014

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